<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>css学习4</title>
    <style>
        span {
            color: red;
            /* border-width: 3px;
            border-style: solid;
            border-color: aqua; */
            /* border: solid aqua;
            border-width: 3px 2px 6px 2px; */
            display: block;
            border: solid rgba(76, 58, 38, 0.342);
            border-width: 3px 2px 6px 2px;
            width: 500px;
            height: 200px;
        }
    </style>
</head>

<body>
    <!-- <span style="display: block;">这是一个span</span> -->
    <span>这是一个span</span>
    <div>这是一个div</div>
    <div>这是一个div</div>
    <div>这是一个div</div>
</body>

</html>